"Here's a link to the metal plugs I use for single wall metal flues. Recommended by my BPI training provider. They have worked well for me. Sorry, there's no picture of the product on their site.
Downside is that the price doubles with…"

"The rebate is tied to heating/cooling energy usage. I've simulated a lot of different things trying to determine what makes the biggest impact for Atlanta - Zone 3, and equipment efficiency seems to have the biggest impact. 15 SEER with a…"